| 摘要 |
PROBLEM TO BE SOLVED: To provide a tension of belt measurement method capable of correctly measurement the tension of a belt, without changing the running condition and of measurement of the tension of the belt in noncontact condition, while making the belt run and drive, while hanging the belt on the pulley. SOLUTION: A front reflection mark 3 and A rear reflection mark 4 are provided on the belt 1, and a front optical sensor 5 and a rear optical sensor 6 are arranged along the belt 1. At the reference test i.e. wherein a tension is T<SB>0</SB>, is performed no-load to the belt 1, a time t<SB>A0</SB>and a time t<SB>B0</SB>are measured, based on the detections by the front reflection mark 3 and the rear reflection mark 4 by the front optical sensor 5 and the rear optical sensor 6. At the measurement test in which the belt 1 is made to run with a tension T, time t<SB>A1</SB>and time T<SB>B1</SB>are measured, based on the detection of the front reflection mark 3 and the rear reflection mark 4 due to the front optical sensor 5 and the rear optical sensor 6. The tension T of the belt 1 is obtained by the Equation: T=T<SB>0</SB>+K[(t<SB>A1</SB>×t<SB>B0</SB>)/(t<SB>B1</SB>×t<SB>A0</SB>)-1], where K is the intrinsic constant of the belt. COPYRIGHT: (C)2008,JPO&INPIT
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